calculus

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Synonyms for calculus

an incrustation that forms on the teeth and gums

the branch of mathematics that is concerned with limits and with the differentiation and integration of functions

References in periodicals archive ?
The one grapefruit-sized gastrolith puzzles Gillette because all the other rocks have far smaller diameters.
n A sauropod's stomach could hold up to half a tonne and had large stones inside it - gastroliths - to help grind down and digest the food.
New analyses of the gastroliths in ostriches are casting doubt on that theory.
Those clues include gastroliths, or stomach stones, that would have ground ingested vegetation to a pulp.
Gastroliths are similar to modern birds' gizzard stones, which help grind vegetation and hard-shelled invertebrates into a more easily digested pulp.